Hydroelastic oscillations of a viscous infinitely long liquid column |
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| Affiliation: | 1. School of Aeronautics, Northwestern Polytechnical University, Xi''an 710072, China;2. School of Mechanics and Aerospace Engineering, Southwest Jiaotong University, Chengdu, 611756, China;1. Faculty of Maritime and Transportation, Ningbo University, Ningbo 315000, China;2. College of Power and Energy Engineering, Harbin Engineering University, Harbin 150001, China;1. School of Mechanical Engineering and Automation, Northeastern University, Shenyang 110819, China;2. Key Laboratory of Vibration and Control of Aero-Propulsion Systems Ministry of Education of China, Northeastern University, Shenyang 110819, China |
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| Abstract: | The coupled frequencies of hydroelastic systems in zero gravity consisting of an elastic shell and a viscous liquid layer with a free surface have been treated. The system exhibits either an annular liquid layer around an elastic cylindrical center shell or a liquid layer inside an elastic infinitely long container. The first case has been evaluated numerically, where the influence of the liquid surface tension parameter, the elasticity parameter of the shell, its axial deflection wave length l and the thickness of the layer have been determined. In contrast to the hydroelastic system with an ideal liquid, the system with viscous liquid exhibits instability of the liquid surface as well as the shell. |
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